Structure for connecting a plurality of battery modules to constitute a battery pack

摘要

A plurality of prismatic cell cases having short lateral walls and long lateral walls are coupled together such that each of the short lateral walls of these cell cases is common to two adjacent cell cases as partitions, thereby constituting an integral battery case of a battery module. Each of the cell cases respectively accommodating therein elements for electromotive force, and electrode connecting terminals of positive and negative polarities are arranged at lengthwise opposite ends of the battery module. A large number of projections are formed dispersedly on both side faces of the battery module for forming coolant passages between two battery modules when butted with corresponding plurality of projections formed on both sides of an adjacent battery module. The height of the projections positioned opposite the partitions in the integral battery case is set lower than the height of the other projections.